Beta Apodis
Template:Location mark Location of β Apodis (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Apus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | +4.24[2] |
| Characteristics | |
| Evolutionary stage | red clump[3] |
| Spectral type | K0 III[4] |
| U−B Template:Engvar | +0.95[2] |
| B−V Template:Engvar | +1.06[2] |
| Astrometry | |
| Radial velocity (Rv) | −30.3±0.7[5] km/s |
| Proper motion (μ) | RA: −281.986 mas/yr[1] Dec.: −354.837 mas/yr[1] |
| Parallax (π) | 20.9535±0.1597 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 0.819[3] |
| Details | |
| Mass | 1.84[3] Template:Solar mass |
| Radius | 11[6] Template:Solar radius |
| Luminosity | 50[6] Template:Solar luminosity |
| Surface gravity (log g) | 2.82±0.18[7] cgs |
| Temperature | 4,855±112[7] K |
| Metallicity [Fe/H] | –0.03±0.04[7] dex |
| Rotational velocity (v sin i) | 1.3[8] km/s |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[9] | |
| Database references | |
| SIMBAD | data |
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Beta Apodis is a star in the southern circumpolar constellation of Apus. Its identifier is a Bayer designation that is Latinized from β Apodis, and abbreviated Bet Aps or β Aps, respectively. The apparent visual magnitude of this star is +4.24,[2] which is bright enough to be seen with the naked eye. It is located at a distance of approximately Script error: No such module "convert". from Earth,[1] as determined by parallax measurements. The star is drifting closer with a heliocentric radial velocity of −30 km/s.[5]
The spectrum of this star matches a stellar classification of K0 III,[4] which, according to models of stellar evolution, indicates that it is in the giant star stage, having exhausted the supply of hydrogen at its core. The measured angular diameter of this star is Script error: No such module "val"..[10] At the estimated distance of this star, this yields a physical size of about 11 times the radius of the Sun.[11] The expanded outer atmosphere of Beta Apodis has an effective temperature of about 4,855 K.[7] This heat is causing it to glow with the characteristic orange hue of a K-type star.[12]
Naming
In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Exotic Bird, refers to an asterism consisting of β Apodis, ζ Apodis, ι Apodis, γ Apodis, δ Octantis, δ1 Apodis, η Apodis, α Apodis and ε Apodis. Consequently, β Apodis itself is known as Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx.)[13]
References
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- ↑ a b c d e Template:Cite Gaia EDR3
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- ↑ a b c d Script error: No such module "citation/CS1".
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- ↑ Template:Cite simbad
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- ↑ Script error: No such module "citation/CS1".. The radius (R*) is given by:
- ↑ Script error: No such module "citation/CS1".
- ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 29 日 Template:Webarchive
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